Source code for objutils.mostec

#!/usr/bin/env python

__version__ = "0.1.0"

__copyright__ = """
    objutils - Object file library for Python.

   (C) 2010-2019 by Christoph Schueler <github.com/Christoph2,
                                        cpu12.gems@googlemail.com>

   All Rights Reserved

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""


import objutils.checksums as checksums
import objutils.hexfile as hexfile
import objutils.utils as utils


DATA = 1
EOF = 2




[docs]
class Reader(hexfile.Reader):
    FORMAT_SPEC = ((DATA, ";LLAAAADDCCCC"), (EOF, ";00"))



[docs]
    def check_line(self, line, format_type):
        if format_type == DATA:
            if line.length != len(line.chunk):
                raise hexfile.InvalidRecordLengthError("Byte count doesn't match length of actual data.")
            checksum = checksums.lrc(
                utils.make_list(utils.int_to_array(line.address), line.length, line.chunk),
                16,
                checksums.COMPLEMENT_NONE,
            )
            if line.checksum != checksum:
                raise hexfile.InvalidRecordChecksumError()





[docs]
    def is_data_line(self, line, format_type):
        return format_type == DATA








[docs]
class Writer(hexfile.Writer):
    MAX_ADDRESS_BITS = 16



[docs]
    def compose_row(self, address, length, row):
        checksum = checksums.lrc(
            utils.make_list(utils.int_to_array(address), length, row),
            16,
            checksums.COMPLEMENT_NONE,
        )
        line = f";{length:02X}{address:04X}{Writer.hex_bytes(row)!s}{checksum:04X}"
        return line